The graphics interface is useful in specifying and examining chemical structures and physical properties. In this scientific and technological research paper, the SIMMON (MMSP - Manganite magnetic simulation properties) software is presented, as a visualization program, that allows to observe, the magnetization, susceptibility, energy, specific heat, the hysteresis loops and the resistivity of magnetic materials. This properties can be obtained from the simulation of different manganites

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... /3MnO3, where Re is a rare earth metal ions as La, Nd and Pr with valence 3+, which are bonded with Mn3+-3d4 ions and A is a 2+ alkaline earth ion such as Ba, Ca, Sr, among others, bonded with Mn4+-3d3. The based method for the simulations is Monte Carlo combined with Metropolis algorithm and Heisenberg model.